Donald Trump suggests “there is no drought” in California because the state has “plenty of water.” He promises “to start opening up the water,” and he says he’ll “get it done quick.” But there is a drought, and we explain why there is no “quick” solution.

Ted Cruz said that “one of the worst things that can happen to a species is to be listed on the Endangered Species Act.” But the ESA has led to recovery of a number of species, and there is little evidence that listing harms animals and plants.

Q: Are there three times as many polar bears in the Arctic now as there were in the 1970s?A: The population of polar bears today is larger than it was in the 1970s, due mainly to legislation banning polar bear hunting, but exact numbers are unclear. We couldn’t find any figures showing that the population had tripled.